You open up a third track!
That is effectively what happened last week in Copenhagen at the
15th Conference of Parties (COP) under the United Nations Framework
Convention on Climate Change.
One track of negotiations was seeking to reach a binding
extension to the Kyoto Protocol, under which developed nations
would make further binding commitments to limit greenhouse
emissions during a second commitment period. However, the United
States has not ratified the Kyoto Protocol, and indicated that it
did not intend to do so. Further, the Bali Action Plan agreed at
COP13 proposed that developing countries should take nationally
appropriate mitigation actions (NAMAs). Therefore, a second track
of negotiations was pursuing an alternative long-term co-operation
agreement between developed and developing countries to limit
emissions and the consequences of climate change, under the broader
framework of the Climate Change Convention.
